掺石墨烯的高延性水泥基复合材料拉伸敏感性

Resistivity change of high ductility cement-based composites containing graphene under direct tension

研究纳米石墨烯片(GnPs)或氧化石墨烯(GO)掺杂高延性水泥基复合材料(SHCC)的拉伸力学性能、导电性和拉伸机敏性。研究表明,当GnPs掺量低于0.8%时,GnPs-SHCC的拉伸强度高于SHCC,但对延性的影响不大。GnPs的掺入提高了材料的导电性,但在拉伸时电阻变化的灵敏度系数降低。GO在较小的掺量下(0~0.05%),与未掺加GO的SHCC相比GO-SHCC的拉伸强度和延性降低,但其对拉应变的敏感性提高,GOSHCC的灵敏度系数为SHCC的8~9倍。

The tensile mechanical properties,electrical conductivity and tensile strain self-sensing properties of strain hardening cement-based composites （SHCC） containing graphene nanoplatelets （GnPs） or graphene oxide （GO） were investigated in this paper. Results show that when the content of GnPs was less than 0.8% , tensile strength of GnPs-SHCC was higher than that of conventional SHCC, but GnPs showed little influence on duc-tility. Electrical conductivity of GnPs-SHCC increased with the increasing contents of GnPs, but the gauge fac-tor decreased. Although GO with small contents of 0-0.05% was used, tensile strength and ductility of G〇-SHCC both decreased obviously, while the gauge factor of that increased by 8-9 times.